`1` ```exercism fetch clojure crypto-square ```

Crypto Square

Implement the classic method for composing secret messages called a square code.

Given an English text, output the encoded version of that text.

First, the input is normalized: the spaces and punctuation are removed from the English text and the message is downcased.

Then, the normalized characters are broken into rows. These rows can be regarded as forming a rectangle when printed with intervening newlines.

For example, the sentence

 `1` ```"If man was meant to stay on the ground, god would have given us roots." ```

is normalized to:

 `1` ```"ifmanwasmeanttostayonthegroundgodwouldhavegivenusroots" ```

The plaintext should be organized in to a rectangle. The size of the rectangle (`r x c`) should be decided by the length of the message, such that `c >= r` and `c - r <= 1`, where `c` is the number of columns and `r` is the number of rows.

Our normalized text is 54 characters long, dictating a rectangle with `c = 8` and `r = 7`:

 ```1 2 3 4 5 6 7``` ```"ifmanwas" "meanttos" "tayonthe" "groundgo" "dwouldha" "vegivenu" "sroots " ```

The coded message is obtained by reading down the columns going left to right.

The message above is coded as:

 `1` ```"imtgdvsfearwermayoogoanouuiontnnlvtwttddesaohghnsseoau" ```

Output the encoded text in chunks that fill perfect rectangles `(r X c)`, with `c` chunks of `r` length, separated by spaces. For phrases that are `n` characters short of the perfect rectangle, pad each of the last `n` chunks with a single trailing space.

 `1` ```"imtgdvs fearwer mayoogo anouuio ntnnlvt wttddes aohghn sseoau " ```

Notice that were we to stack these, we could visually decode the cyphertext back in to the original message:

 ```1 2 3 4 5 6 7 8``` ```"imtgdvs" "fearwer" "mayoogo" "anouuio" "ntnnlvt" "wttddes" "aohghn " "sseoau " ```

Source

J Dalbey's Programming Practice problems http://users.csc.calpoly.edu/~jdalbey/103/Projects/ProgrammingPractice.html

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